High Torque Clock Movement (Ultra Quiet) w/12 In. Long Hands (No6) and 3" White Wall Mounting Hub motor size: 2-3/16" sq. x 5/8 thick x 5/16" dia. threaded shaft motor's threaded shaft length 3/8" (total 5/8" w/hand stem) high torque continuous motion motor (super quiet) black metal hands and choice of white or black mounting hub 3 year factory warranty